/*
 * @(#) DateConverter.java
 *
 * Copyright 2002 - 2003 JIDE Software. All rights reserved.
 */
package com.element.converter.impl;

import com.element.converter.ConverterContext;
import com.element.converter.ObjectConverter;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Converter which converts Date to String and converts it back.
 */
public class MonthConverter extends ObjectConverter {

	/**
	 * Default ConverterContext for MonthConverter.
	 */
	public static ConverterContext CONTEXT_MONTH = new ConverterContext("Calendar.Month");

	private DateFormat _conciseFormat = new SimpleDateFormat("MMyy");
	private DateFormat _shortFormat = new SimpleDateFormat("MM/yy");
	private DateFormat _mediumFormat = new SimpleDateFormat("MM, yyyy");
	private DateFormat _longFormat = new SimpleDateFormat("MMMMM, yyyy");

	private DateFormat _defaultFormat = _shortFormat;

	/**
	 * Creates a new CalendarConverter.
	 */
	public MonthConverter() {
	}

	public String toString(Object object, ConverterContext context) {
		if (!(object instanceof Calendar)) {
			return "";
		} else {
			return _defaultFormat.format(((Calendar) object).getTime());
		}
	}

	public Object fromString(String string, ConverterContext context) {
		Calendar calendar = Calendar.getInstance();
		try {
			Date time = _defaultFormat.parse(string);
			calendar.setTime(time);
		} catch (ParseException e1) { // if current formatter doesn't work try those default ones.
			try {
				Date time = _shortFormat.parse(string);
				calendar.setTime(time);
			} catch (ParseException e2) {
				try {
					Date time = _mediumFormat.parse(string);
					calendar.setTime(time);
				} catch (ParseException e3) {
					try {
						Date time = _longFormat.parse(string);
						calendar.setTime(time);
					} catch (ParseException e4) {
						try {
							Date time = _conciseFormat.parse(string);
							calendar.setTime(time);
						} catch (ParseException e5) {
							return null;  // nothing works just return null so that old value will be kept.
						}
					}
				}
			}
		}
		return calendar;
	}

	/**
	 * Gets DefaultFormat to format an calendar.
	 *
	 * @return DefaultFormat
	 */
	public DateFormat getDefaultFormat() {
		return _defaultFormat;
	}

	/**
	 * Sets DefaultFormat to format an calendar.
	 *
	 * @param defaultFormat the default format to format a calendar.
	 */
	public void setDefaultFormat(DateFormat defaultFormat) {
		_defaultFormat = defaultFormat;
	}
}
